Interpretation of Geomagnetic survey data has been
conducted to determine Iron Ore spreading at Riam Kota area Jelai Hulu Subdistrict Ketapang Regency West Kalimantan. Acquisition process was done using Proton Precession Magnetometer PPM and the acquisition points were determined using Global Positioning System GPS. The method used in the
acquisition process is looping method with a Fixed Base. Overall. anomaly data processing were done in steps from Diurnal Variation Correction to Reduction to Pole. Magnetic anomaly that has been Reducted to the Pole using MagPick and Excell
display the Iron Ore spreading which is going Northward of the research area where there are many anomaly shown in that area.

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